go语言中的return语句

func  函数名（形参列表）（返回值类型列表）{
​	语句
​	return返回值列表
}

package main
import (
	"fmt"
)
func test(n1 int){
	n1 = n1 + 1
	fmt.Println("test() n1=",n1)
}
func getSum(n1 int,n2 int) int {
	sum := n1 + n2
	fmt.Println("getSum sum=",sum)
	return sum
}
func getSumAndSub(n1 int,n2 int)(int,int){
	sum := n1 + n2
	sub := n1 - n2
	return sum,sub
}
func main(){
	n1 := 10
	test(n1)
	fmt.Println("main() n1=",n1)

	sum := getSum(10,20)
	fmt.Println("main sum = ",sum)

	res1,res2 := getSumAndSub(8,2)
	fmt.Printf("res1=%v res2=%v\n",res1,res2)

	_,res3 := getSumAndSub(3,9)
	fmt.Println("res3=",res3)
}

package main
import (
	"fmt"
)
func test(n int){
	if n > 2 {
		n--
		test(n)
	}
	fmt.Println("n=",n)
}
func main() {
	test(4)
}